A-B 1756-L71 ControlLogix Processor Module

Allen-Bradley 1756-L71 ControlLogix Processor Module

 

 

The Allen-Bradley 1756-L71 is a ControlLogix 5570 series processor module designed for high-performance industrial automation and process control. As the central CPU of a ControlLogix system, it executes user programs, processes I/O data, coordinates communication between devices, and supports advanced motion and process control applications. It is widely used in manufacturing, energy, water treatment, oil & gas, and other mission-critical automation systems.

Product Specifications

• Brand: Allen-Bradley (Rockwell Automation)
• Model: 1756-L71
• Series: ControlLogix 5570
• Product Type: Processor (CPU) Module
• User Memory: 2 MB
• I/O Memory: 0.98 MB
• Maximum Digital I/O: 128,000 points
• Maximum Analog I/O: 4,000 points
• Maximum Total I/O: 128,000 points
• Programming Port: 1 × USB 2.0 (temporary local programming)
• Power Dissipation: 2.5 W
• Thermal Dissipation: 8.5 BTU/hr
• Installation: Fits any slot in a 1756 ControlLogix chassis
• Non-Volatile Memory: 1 GB Secure Digital (SD) card supplied
• Supported Motion Axes: Up to 100
• Supported Networks: EtherNet/IP, ControlNet, DeviceNet, Data Highway Plus, Remote I/O (through communication modules)

Main Features

• High-speed ControlLogix 5570 processor
• Supports large-scale distributed automation systems
• High-capacity memory for complex control applications
• Supports multiple periodic, continuous, and event tasks
• Integrated USB programming interface
• Compatible with a wide range of ControlLogix I/O and communication modules
• Supports redundant ControlLogix system architectures
• SD card support for firmware and project backup
• Reliable industrial-grade operation for continuous 24/7 production

Typical Applications

• Industrial automation production lines
• PLC machine control
• Process automation systems
• Oil & gas facilities
• Chemical plants
• Water and wastewater treatment
• Power generation plants
• Automotive manufacturing
• Food & beverage processing
• Material handling and packaging systems

Advantages

• High processing performance for demanding control tasks
• Excellent scalability for small to very large systems
• Supports large numbers of local and remote I/O
• Flexible networking through optional communication modules
• Reliable long-term industrial operation
• Easy integration with other ControlLogix products
• Widely supported within the Rockwell Automation ecosystem

Precautions

• Must be installed in a compatible 1756 ControlLogix chassis
• Requires a compatible ControlLogix power supply and backplane
• Firmware version should match the Studio 5000 / Logix Designer project
• Use proper ESD protection during installation
• The USB port is intended for temporary programming only and should not remain permanently connected, especially in hazardous locations.